<template>
  <el-container class="home-container">
      <!-- 头部区域 -->
    <el-header>
      <div>
          <img src="../assets/heima.png" alt="">
          <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主题区域 -->
    <el-container>
        <!-- 侧边栏 -->
      <el-aside :width="isCollapse?'64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
           <el-menu   
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409eff" 
      :unique-opened="true" 
      :collapse="isCollapse"
      :collapse-transition="false"
      :router="true"
      :default-active="activePath">
      <!-- 一级菜单 -->
      <el-submenu :index="item.id +''" v-for="item in menulist" :key="item.id">
          <!-- 一级菜单的模板区域 -->
        <template slot="title">
            <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
            <template slot="title">
            <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>
      </el-submenu>
      
    </el-menu>
      </el-aside>
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
      <!-- 右侧内容主体 -->
    </el-container>
  </el-container>
</template>
<script>
export default {
    data(){
      return{
        //左侧菜单数据
        menulist:[],
        iconsObj:{
          '125':'iconfont icon-user',
          "103":'iconfont icon-tijikongjian',
          "101":'iconfont icon-shangpin',
          "102":'iconfont icon-danju',
          "145":'iconfont icon-baobiao'
        },
      //是否折叠
      isCollapse:false,
      //被激活的链接地址
      activePath:''

      }
    },
  created() {
    this.getMenuList()
    this.activePath=window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //获取所有的菜单
   async getMenuList(){
    const{data:res}= await this.$http.get('menus')
    if(res.meta.status!==200)return this.$message.error(res.meta.msg)
    this.menulist=res.data
    console.log(res);
    
    },
    //点击按钮，切换菜单的折叠与展开
    toggleCollapse(){
      this.isCollapse=!this.isCollapse
    },
    //保存连接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath=activePath
    }
  }
}
</script>
<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    >div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }
}
.el-aside{
    background-color: #333744;
    .el-menu{
      border-right: none;
    }
}
.el-main{
    background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;  
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}                         
</style>